Responsive To Change In Rate Of Fluid Flow Patents (Class 137/497)
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Patent number: 10087917Abstract: An object of the present invention is to provide a pump device that is capable of improving a discharge performance. A first orifice 301 that is provided on a discharge oil passage (a pipe 12) of a pump 2 and a second orifice 302 that, when a flow amount Q becomes greater than a predetermined flow amount Q1, allows pass of brake fluid are provided.Type: GrantFiled: May 20, 2013Date of Patent: October 2, 2018Assignee: Hitachi Automotive Systems, Ltd.Inventors: Masayuki Saito, Chiharu Nakazawa, Masaki Misunou
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Patent number: 9784375Abstract: A pressure independent control valve contains a valve body with an inlet, an outlet and a flow channel coupling the inlet to the outlet. A hollow piston is arranged in a seat in the valve body, such that the hollow piston is configured to move. The hollow piston has an enclosure, such that the pressure independent control valve maintains different fluid pressures in the flow channel and inside the hollow piston. The pressure independent control valve contains a chamber and a biasing member to urge the hollow piston towards the chamber. The chamber is in fluid communication with the inlet and with the inside of the hollow piston, such that the valve applies substantially the same pressure inside the annular channel, at the inlet and inside the hollow piston.Type: GrantFiled: April 24, 2015Date of Patent: October 10, 2017Assignee: Siemens Schweiz AGInventor: Stefan Hagmann
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Patent number: 9004452Abstract: Valve bodies having integral boost reducing capability are described herein. An example fluid regulator includes a body having a main passageway defining an orifice to fluidly couple an inlet and an outlet where the main passageway defines an inlet volume boundary between the inlet and the orifice and an outlet volume boundary between the orifice and the outlet. A portion of the outlet volume boundary includes an inner wall adjacent the orifice. A valve plug is disposed within the second portion of the passageway such that the inner wall substantially surrounds an outer surface of the valve plug to substantially restrict fluid flow between the inner wall and the outer surface of the valve plug and toward the throat. The valve body having a secondary fluid passage within the outlet volume boundary to increase fluid flow toward the throat of the valve body when a fluid flows across the orifice.Type: GrantFiled: September 30, 2011Date of Patent: April 14, 2015Assignee: Emerson Process Management Regulator Technologies, Inc.Inventors: Jared B. Chizek, David Blair Davis
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Publication number: 20150068610Abstract: A method for determining a value of a current, which is required for changing a switching state of a pressure control valve of a fuel delivery system, in which the current flowing through the pressure control valve is varied from a starting value up to a target value, and a time curve of the current is analyzed, the value required for changing the switching state being reached when the curve of the current has a change in slope, this change being detected via a first derivation over time of the current.Type: ApplicationFiled: August 6, 2012Publication date: March 12, 2015Applicant: ROBERT BOSCH GMBHInventors: Andreas Sommerer, Sebastien Chatelain, Raphael Combe, Markus Viereck
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Publication number: 20150027558Abstract: A mass flow controller includes at least one conduit having a fluid inlet and a fluid outlet, the conduit defining a flow path along which the fluid flows. The mass flow controller also includes a modified inlet block having an inlet aperture, an inlet channel, and a reservoir fluidly coupled to the inlet channel and the conduit that enhances flow through the controller and improves rate-of-decay measurements. The mass flow controller includes at least one flow sensor that generates a flow sensor signal that is proportional to the mass flow rate of the fluid through the conduit. The mass flow controller includes a control sub-system coupled to a flow sensor and a valve assembly to control flow through the conduit.Type: ApplicationFiled: March 4, 2013Publication date: January 29, 2015Inventors: Anthony Kehoe, John Lull, Bill Valentine, Chris Ellec
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Publication number: 20140345267Abstract: The invention relates to a fluid valve arrangement having a bistable fluid valve for at least one fluid line with a valve body which can be moved into two positions for two switching states, a pressure pulse generator being provided for valve switchover in the feed line for switching over a feed line and a return line between two flow lines, and the fluid valve comprising a reversing unit which has two chambers which are separated from one another by a bistable surface element, the two chambers being connected to the two flow lines and the bistable surface element being operatively coupled to the valve body in order to actuate it. As a result, a bistable fluid valve is provided which can be reversed by way of pressure pulses or pressure flanks and otherwise has no energy requirement.Type: ApplicationFiled: August 13, 2012Publication date: November 27, 2014Inventors: Stefan Storm, Raphael Rammer
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Publication number: 20140246102Abstract: A flow control valve includes a housing that includes a fluid inlet and a fluid outlet; a valve body that together with the housing, forms a first chamber with a variable volume and a second chamber with a variable volume; a communication passage that connects the first chamber and the second chamber together; and an urging portion that urges the valve body in a direction in which the volume of the first chamber decreases. When the valve body moves in a direction to increase the volume of the first chamber against urging force of the urging portion, the valve body moves closer to the fluid outlet and reduces a degree to which the second chamber is communicated with the fluid outlet.Type: ApplicationFiled: October 5, 2012Publication date: September 4, 2014Applicants: Toyota Jidosha Kabushiki Kaisha, Pacific Industrial Co., Ltd.Inventors: Koki Uno, Hiroo Tabushi, Takaaki Ichikawa, Kiyotaka Kasugai, Koji Nakayama
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Patent number: 8820347Abstract: In a magnet system for MRI imaging comprising a superconducting magnet mounted within a cryogen vessel, apparatus is provided for controlling egress of cryogen gas from the cryogen vessel. The apparatus comprises a controlled valve linking the interior of the cryogen vessel to a gas exit path; and a controller arranged to control the valve. The valve is arranged such that a gas pressure in the cryogen vessel exceeding a gas pressure in the gas exit path acts on the valve to open the valve and allow venting of cryogen gas. The valve is also arranged such that a gas pressure in the cryogen vessel inferior to a gas pressure in the gas exit path acts on the valve to urge it closed, so restricting flow of gas into the cryogen vessel.Type: GrantFiled: May 11, 2009Date of Patent: September 2, 2014Assignee: Siemens PLCInventor: Nicholas Mann
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Patent number: 8763632Abstract: The invention relates to a valve combination for regulating the rate of flow or the differential pressure in liquid-conveying heating and cooling systems, consisting of a housing (2) provided with a feed pipe (10), a discharge pipe (11) and a connection pipes (6) arranged between them and a regulator (3) which is arranged axially in the connection pipe (6), wherein the regulator (3) keeps the differential pressure constant at a preset value by means of a first flow regulator (4) also arranged axially in the connection pipe (6) and can be adjusted by an actuating part (8) which projects from the housing (2) and acts on a second seat (24), and by means of a presettable second flow regulator (5) which is arranged axially or coaxially thereto, wherein the flow cross section (9) is adjustable, which is characterized in that, when an actuator (29) that acts on the actuating part (8) is installed, the flow cross section (9) is adjustable by means of a handle (7) not covered by the actuator and that, when the actuatoType: GrantFiled: April 18, 2008Date of Patent: July 1, 2014Assignee: Oventrop GmbH & Co. KGInventor: Gerhard Loeffler
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Patent number: 8701715Abstract: The present invention provides, in part, a valve assembly and method that maintains balance of flow to pressure in fluid and gas piping system applications. In one embodiment, the present invention includes a main body component adapted to retain a chamber body component, a fluid control plate and seal, and a chamber cap. The chamber body component is slidably maintained within the main body component. A resilient gland member is securably attachable to one end of the main body component and the chamber body component, and acts as a seal and a memory for returning the chamber body component to a standard operating position upon fluid pressure environment shifting the chamber body component towards a shut off position. In one embodiment, the chamber cap, gland member and a pressure plate member act as an end body member securable to an end of the main body component and chamber body component.Type: GrantFiled: October 24, 2013Date of Patent: April 22, 2014Assignee: Quick Fitting, Inc.Inventors: David B. Crompton, Libardo Ochoa Dias
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Patent number: 8671974Abstract: Disclosed herein is a flow-actuated actuator. The actuator includes, a tubular with a flow passageway having a first flow area, and at least one movable member in operable communication with the tubular. The at least one movable member is movable relative to the tubular between at least a first position and a second position, the at least one movable member configured to form a second flow area that is smaller than the first flow area when in the second position, the flow-actuated actuator is configured to move a separate member in response to fluid flow therethrough.Type: GrantFiled: May 20, 2009Date of Patent: March 18, 2014Assignee: Baker Hughes IncorporatedInventors: Richard Patterson, Gary B. Lake, Yang Xu, Terry R. Bussear
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Patent number: 8656944Abstract: A valve element combines a metering function and a pressure regulating function. A valve housing houses a metering valve. The metering valve is movable by a control to meter an amount of fluid delivered from an inlet to an outlet. A pressure regulating valve is received within the valve housing and is supplied with a pressure delivered into the inlet on a first face, and a pressure downstream of the outlet on a second face. The pressure regulating valve acts to regulate the pressure drop across the metering valve to ensure accurate fluid metering.Type: GrantFiled: October 10, 2008Date of Patent: February 25, 2014Assignee: Hamilton Sundstrand CorporationInventors: Paul M. Benney, Justin R. Morini
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Patent number: 8555916Abstract: An electromagnetic valve having a flow control function. A valve body has an inlet, an outlet, a valve chest, and a valve plate contained inside the valve chest. The valve plate opens and closes a valve seat using a movable core in order to control the flow rate of water and to prevent backflow. A first channel is disposed inside the outlet. A flow control means, configured as a single unit, is inserted into the outlet, and includes a mover for opening and closing a flow of water by being detached from and brought into contact with the first channel, a stator disposed coaxially with the mover. The stator allows the mover to be elastic and freely movable using a restoring element. A flow rate control element is supported on the stator, and has a predetermined interval from the stator to form a second channel.Type: GrantFiled: November 14, 2011Date of Patent: October 15, 2013Assignee: Useong Electro Mechanics Co., Ltd.Inventor: Gwan Ho Ro
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Publication number: 20130228239Abstract: Provided is a pressure equalizing device for facilitating drug reconstitution in a closed system. The pressure equalizing device includes a container for attachment to a receptacle, to permit pressure equalization between the container and the receptacle. The container includes a first chamber and a second chamber. The device further includes a vent channel extending between the first chamber and a distal opening of the vent channel. In accordance with the invention, when the receptacle is connected to the pressure equalizing device, the vent channel establishes direct fluid communication between the first chamber and the receptacle. Additionally, a longitudinal axis of the pressure equalizing device is configured to be aligned with or parallel to a longitudinal axis of the receptacle when the pressure equalizing device is attached to the receptacle.Type: ApplicationFiled: March 1, 2013Publication date: September 5, 2013Inventor: Alexander Cederschiƶld
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Publication number: 20130061955Abstract: An assembly of valve sections 10 includes an inlet section 12, an outlet section 14, a working section 16, and a working section 18. The working section 16 is a conventional pressure compensated working section. The working section 18 includes a directional control valve 21, a pressure compensator valve 50, and a pressure limiter valve 52. The valves 50 and 52 are of integral construction, such that each is an essential part to complete the other. The pressure compensator valve 50 includes a pressure compensator spool 60 movable between an opened position (FIGS. 2 and 5) and a closed position (FIGS. 4 and 6) in response to a pressure differential across the spool. The pressure limiter valve 52 includes a pressure limiter spool 76 that moves to an open position to change the pressure differential and close the pressure compensator valve when a selected limit pressure is reached.Type: ApplicationFiled: November 22, 2010Publication date: March 14, 2013Inventor: Gregory Coolidge
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Publication number: 20120298221Abstract: A mass flow controller with high accuracy flow rate output control is disclosed. In the mass flow controller, relation data that indicates a corresponding relation between a flow rate of a reference gas and a CF value of a sample gas is stored, a target flow rate is converted into a reference gas flow rate by the use of a predetermined CF value, a sample gas flow rate is calculated from the converted reference gas flow rate and a CF value corresponding to the reference gas flow rate, the sample gas flow rate is compared with the target flow rate, and the CF value that is used for conversion of the reference gas flow rate or calculation of the sample gas flow rate is updated by the use of the corresponding relation based on the error between the sample gas flow rate and the target flow rate.Type: ApplicationFiled: December 22, 2010Publication date: November 29, 2012Applicant: HORIBA STEC, CO., LTD.Inventors: Hiroyuki Takeuchi, Yutaka Yoneda, Yasuhiro Isobe
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Publication number: 20120285547Abstract: A pressure reducer having a high-pressure inlet, a low-pressure outlet and a valve having a valve seat and a valve plunger, which interacts therewith and can be displaced in a direction of displacement. When displaced away from the valve seat, the valve plunger opens a first path between the high-pressure inlet and the low-pressure outlet. The pressure reducer furthermore includes a second path, which connects the high-pressure inlet and the low-pressure outlet, a first control valve, which is arranged in the course of the second path, and a first effective area of the valve plunger, which is arranged in the course of the second path and is aligned in such a way that a first control pressure acting thereon results in a first force on the valve plunger in the direction of displacement.Type: ApplicationFiled: May 10, 2012Publication date: November 15, 2012Applicant: MAGNA STEYR Fahrzeugtechnik AG &Co KGInventor: Peter PUCHER
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Patent number: 8276611Abstract: An in-line fluid flow control valve includes a housing defining an inlet chamber and an outlet chamber aligned along a outlet axis. The housing further defines a bore with a flow control device and an adjustment mechanism disposed therein for regulating a fluid flow rate. The flow control device defines a fluid passage interconnecting the inlet chamber and the outlet chamber. The plane and the outlet axis define an acute angle therebetween. The angled position of the bore relative to the outlet axis permits access to and adjustment of the flow control device, as well as replacement of the flow control device, without disconnecting any fittings attached to the inlet and the outlet of the control valve.Type: GrantFiled: September 12, 2008Date of Patent: October 2, 2012Assignee: BASF CorporationInventors: John H. Swab, Matthew C. Dunlap, Thomas M. Suggs, Donald E. Weber
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Patent number: 8205636Abstract: In a pressure compensation type flow rate control valve, overshoot of a flow rate when an upstream pressure is abruptly increased is suppressed. A first variable orifice 11 is provided on the side of an inflow opening and a second variable orifice 15 is provided on the side of an outflow opening. As the spool 3 is displaced from its initial position by a pressure of fluid entering when the upstream fluid pressure is increased, the opening of the first variable orifice 11 is gradually reduced, and the opening of the second variable orifice 15 is gradually increased. Since the second variable orifice 15 on the side of the outflow opening is previously reduced, even if the upstream pressure is abruptly increased, fluid more than a predetermined amount does not flow out toward the downstream.Type: GrantFiled: June 6, 2008Date of Patent: June 26, 2012Assignee: Shimadzu CorporationInventor: Junya Kuromusha
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Patent number: 8205637Abstract: A flow-actuated actuator includes a plurality of rings positionable within a structure, each ring having a full bore therethrough, and a plurality of elongated members in operable communication with the plurality of rings providing orientation of each ring to at least one adjacent ring. The plurality of rings and the plurality of elongated members are configured to generate an urging force in response to fluid flow thereby.Type: GrantFiled: April 30, 2009Date of Patent: June 26, 2012Assignee: Baker Hughes IncorporatedInventor: Lale Korkmaz
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Patent number: 8201713Abstract: A pressure compensation member suitable to be placed in a fluid dispensing channel, a valve unit comprising this pressure drop compensation member and a container comprising this pressure compensation member or this valve unit are disclosed. The pressure compensation member is adapted to maintain a substantially constant flow of fluid through the fluid dispensing channel.Type: GrantFiled: April 13, 2009Date of Patent: June 19, 2012Assignee: The Procter & Gamble CompanyInventors: Steven Michael Bourque, M. Scott Curry, Michael Thomas DeMellia, Andrew James Ford, Maurice Paul Matte, Timothy Collin Wheatley
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Publication number: 20110064588Abstract: A liquid pump includes an electronically controlled throttle inlet valve to control pump output. With each reciprocation cycle, a plunger displaces a fixed volume of fluid. When less than this fixed volume is desired as the output from the pump, the electronically controlled throttle inlet valve throttles flow past a passive inlet check valve to reduce output. As a consequence, cavitation bubbles are generated during the intake stroke. Cavitation damage to surfaces that define the inlet port passage are avoided by a specifically shaped and sized cavitation flow adjuster extending from the valve member of the passive inlet check valve. By positioning the cavitation flow adjuster in the inlet port passage, a flow pattern is formed in a way to encourage cavitation bubble collapse away from surfaces that could result in unacceptable cavitation damage to the pump.Type: ApplicationFiled: November 22, 2010Publication date: March 17, 2011Applicant: Caterpillar Inc.Inventors: David C. Mack, Ye Tian, Alan R. Stockner
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Publication number: 20100294381Abstract: A fluid flow regulator includes a valve assembly defining a fluid passage. The fluid passage includes a first port, a second port, a sensing orifice disposed between the first and second ports, a first orifice disposed between the first port and the sensing orifice and a second orifice disposed between the sensing orifice and the second port. A first flow area of the first flow orifice varies in response to differential pressure across the sensing orifice as fluid flows through the fluid passage in a first direction from the first port to the second port. The first flow area is fixed as fluid flows through the fluid passage in an opposite second direction. A second flow area of the second orifice is fixed as fluid flows through the fluid passage in the first direction and varies as fluid flows through the fluid passage in the second direction.Type: ApplicationFiled: May 19, 2009Publication date: November 25, 2010Applicant: Eaton CorporationInventors: Kelly Dale Valtr, Douglas Alexander Scott
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Publication number: 20100229954Abstract: A method and apparatus to control pressure in a fluid delivery system utilizes a variable-pressure regulating means and a flow-controlled selecting means to provide a higher pressure when the flow in the system is higher, and to provide a lower pressure when the flow in the system is lower. It exploits an inherent signal that is generated and transmitted by the fluid, and which enables remote control of the pressure. Useful, for example, to provide pressure control for a garden hose fitted with a closeable nozzle, wherein full pressure is provided through the hose when the nozzle is open, lower pressure is maintained when the nozzle is closed, and the operator controls pressure in the hose from the fluid delivery end of the hose, protecting the hose from bulging or splitting, making the hose easier to handle, and conserving water. Other applications include protecting washing machine supply hoses from bursting and flooding; and pressure control of fire sprinkler, compressed gas, and pneumatic control systems.Type: ApplicationFiled: April 21, 2008Publication date: September 16, 2010Inventor: Douglas Quinten Kitt
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Patent number: 7775235Abstract: An apparatus includes a first portion and a second portion. The first portion includes a mounting surface configured to support a mounting portion of a pressure regulator. The first portion defines a cavity configured to receive at least a portion of the pressure regulator, and an opening configured to provide fluid communication between the cavity and an area outside of the first portion. The second portion includes a mounting surface configured to support the mounting portion of the pressure regulator. The second portion defines a cavity and an opening configured to provide fluid communication between the cavity of the second portion and an area outside of the second portion. The second portion is configured to be coupled to the first portion to form a fluid-tight seal.Type: GrantFiled: May 31, 2007Date of Patent: August 17, 2010Assignee: Synerject, LLCInventors: Kevin L. Leppert, Todd M. Answine, David E. Cvengros
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Publication number: 20100122742Abstract: A fluid control throttle valve includes a first tube and a second tube, both of which have an inner passage respectively. Between the first and second tubes are disposed an adjusting element and a cylindrical communicating element, wherein the adjusting element has a central axis and a plurality of throttling orifices axially disposed therein. The distance between the central axis and the throttling orifices, respectively, is substantially the same with each other, while the throttling orifices are arranged radially around the central axis of the adjusting element, wherein a bore diameter of at least one throttling orifice is different from that of the other throttling orifices. In addition, the communicating element has a through hole axially disposed therein. The communicating element is axially rotatable with respect to the central axis of the adjusting element, wherein the through hole thereof selectively communicates a selected throttling orifice.Type: ApplicationFiled: November 20, 2008Publication date: May 20, 2010Inventor: Hsiao-Mei Lin
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Publication number: 20100089470Abstract: A valve element combines a metering function and a pressure regulating function. A valve housing houses a metering valve. The metering valve is movable by a control to meter an amount of fluid delivered from an inlet to an outlet. A pressure regulating valve is received within the valve housing and is supplied with a pressure delivered into the inlet on a first face, and a pressure downstream of the outlet on a second face. The pressure regulating valve acts to regulate the pressure drop across the metering valve to ensure accurate fluid metering.Type: ApplicationFiled: October 10, 2008Publication date: April 15, 2010Inventors: Paul M. Benney, Justin R. Morini
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Publication number: 20090288718Abstract: Apparatus to regulate fluid flow are disclosed. The apparatus includes an example regulator valve and an example automatically-adjusting or self-adjusting amplifier valve to maintain fluid flow during low downstream demand fluid flow conditions, and to maintain the operational accuracy and stability of the regulator valve during higher downstream demand fluid flow conditions.Type: ApplicationFiled: May 20, 2008Publication date: November 26, 2009Inventor: Jason Jablonski
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Publication number: 20090071548Abstract: Modular in-line fluid regulators are described. One described example modular fluid regulator apparatus includes a body having a fluid inlet and a threaded outer surface to engage a threaded opening in another fluid regulator to serially fluidly couple first and second fluid regulators. The example fluid regulator apparatus also includes valve to control a flow of fluid through the first fluid regulator, and a pressure sensing member operatively coupled to the valve to control a position of the valve to provide a regulated output pressure at an outlet of the first fluid regulator. The pressure sensing member and the valve are configured to be received in a cavity of the second fluid regulator adjacent the threaded opening.Type: ApplicationFiled: September 14, 2007Publication date: March 19, 2009Inventors: Daryll Duane Patterson, Jason Dirk Jablonski
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Publication number: 20080295898Abstract: An apparatus includes a first portion and a second portion. The first portion includes a mounting surface configured to support a mounting portion of a pressure regulator. The first portion defines a cavity configured to receive at least a portion of the pressure regulator, and an opening configured to provide fluid communication between the cavity and an area outside of the first portion. The second portion includes a mounting surface configured to support the mounting portion of the pressure regulator. The second portion defines a cavity and an opening configured to provide fluid communication between the cavity of the second portion and an area outside of the second portion. The second portion is configured to be coupled to the first portion to form a fluid-tight seal.Type: ApplicationFiled: May 31, 2007Publication date: December 4, 2008Inventors: Kevin Leppert, Todd M. Answine, David E. Cvengros
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Publication number: 20080099081Abstract: An adjustment valve includes a first diaphragm integrally formed from an attachment section engaged with and fixed to the bottom of a rod, a joining section to which a valve body is fixed, a thin film section radially extending from a shoulder section, a thick wall section continuous with the thin film section, and a seal section provided at the peripheral edge of the thick wall section. The second diaphragm has a central hole, and includes an integrally formed thin film section radially extending from a thick wall section at the center hole, and a seal section is provided at the peripheral edge thereof. A diaphragm hold-down member penetrates the central hole at the shoulder section of the rod, causing the second diaphragm to be sandwiched and fixed. The rod is disposed with play in the through-hole in the bottom of the cylinder, and is supported by a spring engaged between a step section of the cylinder and the bottom surface of the shoulder in a state such that radial movement is prevented.Type: ApplicationFiled: August 31, 2005Publication date: May 1, 2008Inventor: Takashi Yamamoto
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Publication number: 20020108652Abstract: A device for regulating the flow of gas from an environment. The device includes a shell forming a path through which fluid flows. A fixed grate is disposed in the path so that as fluid flows in the path the fixed grate does not move. A movable grate assembly includes one or more plates and a movable grate attached to the one or more plates. The one or more plates includes an integral hinge such that the plate can rotate about the integral hinge. When the movable grate moves with respect to the fixed grate the impedance on the flow varies.Type: ApplicationFiled: November 6, 2001Publication date: August 15, 2002Inventor: David W. Palmer
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Patent number: 6330878Abstract: A module (22) for an on-board evaporative emission leak detection system that detects leakage from an evaporative emission space of a fuel system of an automotive vehicle. The module has a housing (50) that includes a first port (52) for communicating the housing to the evaporative emission space and a second port (86) for communicating the housing to atmosphere. The housing contains a particulate filter (84) through which the second port communicates with two parallel flow branches that extend within the housing to the first port. One branch contains a vacuum regulator valve (90), and the other, a solenoid-operated vent valve (88). During a leak detection test, the vent valve is operated closed, and a purge valve (20), that selectively communicates the evaporative emission space with the engine intake manifold, is operated open to cause vacuum to be drawn in the evaporative emission space. The vacuum regulator valve regulates evaporative emission space vacuum to a defined vacuum.Type: GrantFiled: May 31, 2000Date of Patent: December 18, 2001Assignee: Siemens Canada LimitedInventors: Paul D. Perry, Ray Rasokas
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Patent number: 6328061Abstract: A refrigerant flow metering device for use in a refrigeration system which uses a movable piston with a fixed flow passage in series with a variable area flow passage. The variable flow area is defined by the position of the piston relative to the containing housing. The position of the movable piston is a function of refrigerant pressure differential across the piston and the force of a spring member acting in an opposite direction on the piston. The variable flow area is defined as the clearance between a tapered fixed housing and the tapered portion of the movable piston. The piston is sealed via an “O” ring seal causing fluid to flow first through a fixed bore and then through the variable flow area.Type: GrantFiled: November 28, 2000Date of Patent: December 11, 2001Inventor: Richard C. Kozinski
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Patent number: 6305414Abstract: A refrigerant flow metering device for use in a refrigeration system which uses a movable piston with a fixed flow passage in series with a variable area flow passage. The variable flow area is defined by the position of the piston relative to the valve body. The position of the movable piston is a function of refrigerant pressure differential across the piston and the force of a spring member acting in an opposite direction on the piston. In one embodiment, the variable flow area is defined as the clearance between a tapered fixed housing and a tapered portion of the movable piston. In an alternative embodiment, the metering device includes a two-piece piston having a re-open feature that increases the inlet orifice diameter of the piston.Type: GrantFiled: November 28, 2000Date of Patent: October 23, 2001Inventor: Richard C. Kozinski
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Patent number: 6289924Abstract: A refrigerant flow metering device for use in a refrigeration system which uses a movable piston with a fixed flow passage in series with a variable area flow passage. The variable flow area is defined by the position of the piston relative to the containing housing. The position of the movable piston is a function of refrigerant pressure differential across the piston and the force of a spring member acting in an opposite direction on the piston. The variable flow area is defined as the clearance between a tapered fixed housing and the tapered portion of the movable piston. The piston is sealed via an “O” ring seal causing fluid to flow first through a fixed bore and then through the variable flow area.Type: GrantFiled: February 24, 2000Date of Patent: September 18, 2001Inventor: Richard C. Kozinski
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Patent number: 6202678Abstract: The present invention is a valve that shuts off only upon excess flow of liquid. A ball is seated within a ball holder. The ball holder has a circumferential side wall. An inlet orifice and one or more circumferential apertures are defined in the circumferential side wall. An outlet orifice is defined in a surface disposed above the ball holder. The ball holder may be disposed within a main body which directs all material flowing in the valve to enter the ball holder. Excess flow of liquid effects a shut-off position of the valve when the excess flow of liquid encounters resistance caused by the circumferential apertures. The resistance causes the liquid to flow through the inlet orifice at a flow high enough to push the ball upwards to a height at which the flow of liquid through the circumferential apertures carries the ball further upward to effectively seal the outlet aperture, at which point the sealed position is maintained by hydrostatic pressure.Type: GrantFiled: May 4, 1999Date of Patent: March 20, 2001Assignee: Agricultural Products, Inc.Inventor: Stanley E. Hawkins
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Patent number: 5918628Abstract: A check valve includes an outer valve body and an inner poppet valve moveable relative to the valve body and spring-biased into a closed position. The inner poppet valve has first and second stage openings. The first stage preferably has a single, relatively small through-hole into the chamber of the poppet valve, while the second stage preferably has multiple openings of a larger diameter. The first and second stage openings are spaced axially along the poppet valve, with the first stage opening being located closer to the valve head of the poppet valve than the second stage openings. In the closed position, fluid flow is blocked through both the first and second stage openings. When the cracking force of the valve is exceeded and the valve head moves away from the valve seat, fill flow occurs through the first stage opening and is restricted through the second stage openings.Type: GrantFiled: April 21, 1998Date of Patent: July 6, 1999Assignee: Parker-Hannifin CorporationInventor: Curtis F. Harding
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Patent number: 5687760Abstract: A regulator including a movably, preferably hingedly, mounted member having a distal face, exposed to a reference pressure, and a frontal face, exposed to fluid passing through the regulator. Attached to the member is a structure that variably impedes fluid flowing through the regulator. The amount that this structure impedes the fluid flow varies as a function of the difference between the pressure of fluid on the frontal face of the member and the reference pressure. The impeder may be an integral part of the piston extending into the path of the fluid flowing through the regulator, or it may be a separate structure attached to the member. As the member moves in response to changes in pressure differential across the piston, each movable segment is displaced with respect to its corresponding fixed segment. As the corresponding segments are further displaced with respect to each other, the impedance to flow increases.Type: GrantFiled: December 4, 1995Date of Patent: November 18, 1997Inventor: David W. Palmer
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Patent number: 5597011Abstract: A regulator including a movably, preferably hingedly, mounted member having a distal face, exposed to a reference pressure, and a frontal face, exposed to fluid passing through the regulator. Attached to the member is a structure that variably impedes fluid flowing through the regulator. The amount that this structure impedes the fluid flow varies as a function of the difference between the pressure of fluid on the frontal face of the member and the reference pressure. The impeder may be an integral part of the piston extending into the path of the fluid flowing through the regulator, or it may be a separate structure attached to the member. As the member moves in response to changes in pressure differential across the piston, each movable segment is displaced with respect to its corresponding fixed segment. As the corresponding segments are further displaced with respect to each other, the impedance to flow increases.Type: GrantFiled: January 27, 1995Date of Patent: January 28, 1997Inventor: David W. Palmer
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Patent number: 5234025Abstract: A substantially constant flow regulating valve includes a piston dividing a bore into two chambers. The piston is spring biased toward the top chamber of the bore. Fluid from the inlet enters the top chamber through a reference pressure passage and exerts a downward force on the piston. Fluid from the inlet also passes through an inlet flow throttle and into the bottom chamber of the bore where it exerts an upward force on the piston in concert with the spring force. The piston includes an end which variably interacts with an orifice in the lower chamber to maintain a constant pressure differential between the top and bottom chambers.Type: GrantFiled: July 28, 1992Date of Patent: August 10, 1993Inventors: Paul K. Skoglund, Thomas J. Hilton
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Patent number: 5129620Abstract: A sealed control valve assembly is provided for use in connection with a fluid valve having an inlet, an outlet and a flow control orifice hydraulically interposed therebetween for controlling the flow through the fluid valve. The valve assembly includes a sealed cylindrical isolator cap sealingly mounted to the fluid valve so that the chamber defined by the isolator cap is in hydraulic communication with the fluid valve. In one embodiment, an armature composed of a magnetic material is reciprocatably disposed within the isolator cap. A modulating plug is connected to a lower end of the armature to extend outside the isolator cap into the fluid valve adjacent the flow control orifice. A magnetic pole piece assembly, including a magnetic sandwiched between a pair of pole pieces, is reciprocatably disposed outside and adjacent to the isolator cap. A diaphragm assembly is provided to move the pole piece assembly down in response to fluid pressure exerted against the diaphragm.Type: GrantFiled: September 28, 1990Date of Patent: July 14, 1992Assignee: Retro-Tech CorporationInventor: Forrest Castetter
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Patent number: 5129619Abstract: A sealed control valve assembly is provided for use in connection with a fluid valve having an inlet, an outlet and a flow control orifice hydraulically interposed therebetween for controlling the flow through the fluid valve. The valve assembly includes a sealed cylindrical isolator cap sealingly mounted to the fluid valve so that the chamber defined by the isolator cap is in hydraulic communication with the fluid valve. In one embodiment, an armature composed of a magnetic material is reciprocatably disposed within the isolator cap. A modulating plug is connected to a lower end of the armature to extend outside the isolator cap into the fluid valve adjacent the flow control orifice. A magnetic pole piece assembly, including a magnet sandwiched between a pair of pole pieces, is reciprocatably disposed outside and adjacent to the isolator cap. A diaphragm assembly is provided to move the pole piece assembly down in response to fluid pressure exerted against the diaphragm.Type: GrantFiled: March 26, 1990Date of Patent: July 14, 1992Assignee: Retro-Tech CorporationInventor: Forrest Castetter
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Patent number: 4858636Abstract: A pressure-compensating, self-flushing, preset flow valve utilizing an emitter for maintaining a continuous microscopic flow of water at a specified continuous rate. The valve includes a housing adapted with an inlet chamber and an outlet chamber and a preset emitter device encapsulated between the inlet and outlet chamber having selectively unplugged outlet ports each capable of delivering a preset microscopic volume of water into the outlet chamber for collective distribution to a moisture maintenance system. The valve housing is adapted with inlet and outlet ports for connecting to a water source and a moisture maintenance system, respectively. In an alternative embodiment the housing may be modified to provide multiple stages of the encapsulated preset emitter device such that each stage is preset for a flow rate for selectively utilization according to seasonal needs.Type: GrantFiled: May 11, 1988Date of Patent: August 22, 1989Inventor: Donald E. Adkins
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Patent number: 4856552Abstract: A flow regulating device comprises a chamber forming element covered by a tube of elastomeric material, which together form a flow passage leading from an inlet port to an outlet port. The flow passage forms a first flow chamber which is partly defined by the elastomeric tube and which is configured such that flow of fluid through the chamber causes inward deflection of the tube and thus constricts the flow cross section of the first flow chamber. The flow passage further forms a second flow chamber downstream of the first flow chamber, the second flow chamber being partly defined by the elastomeric tube, and the configuration being such that flow of fluid through the second flow chamber causes the tube to deflect inwardly and thus constrict the flow cross section of the second flow chamber. In one embodiment the arrangement is such that vortex flow is induced in each of the flow chambers.Type: GrantFiled: November 10, 1987Date of Patent: August 15, 1989Assignee: Silkbell LimitedInventor: Lourens A. V. Hiemstra
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Patent number: 4622992Abstract: Forms of a reaction control valve are disclosed utilizing various control signals with linear and rotary displacement structures to balance flow reaction forces and attain desired signal-responsive positioning. Different flow passage configurations attain different degrees of damping. An embodiment of the valve functions as a flow proportioner.Type: GrantFiled: January 17, 1983Date of Patent: November 18, 1986Inventor: Ivan E. Sutherland
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Patent number: 4545403Abstract: A device for regulating the flow or outflow of liquids comprises an outer encasing tube, having a feed tube connected to an inlet and in which is a cylindrical hose coupling is disposed, which is tightly connected to an outlet. The liquid acts indirectly from the outside on the hose coupling via a gas cushion, so that a pressure difference occurs within the hose coupling, which leads to a bulging, and consequently, a cross-sectional reduction of hose coupling. The complete arrangement is arranged on the dry side of a container wall.Type: GrantFiled: March 23, 1983Date of Patent: October 8, 1985Assignees: Hansjorg Brombach, Heinrich HohlweglerInventors: Daniel Vischer, Peter Volkart
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Patent number: 4415001Abstract: A pressure rise rate limiter valve (10) is designed to limit a pressure surge of a gas or fluid through a rapidly opening valve, thus avoiding hazardous heat buildup in the system. The valve has an inlet port (14) and an outlet port (16) with a spool (24) having a passageway (32) communicating between the two ports. Said passageway (32) also communicates with a cavity (123) in the valve housing (12) through a restricted orifice (36) located at the end opposite the outlet port (16). The gas introduced at the inlet (14) is directed through a series of feeder ports (38) in the spool (24) into the passageway (32) wherein the gas is dispersed both toward the outlet port (16) and toward the cavity (123) in the housing (12).Type: GrantFiled: April 24, 1981Date of Patent: November 15, 1983Assignee: Brunswick CorporationInventor: Preben Kent
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Patent number: 4186876Abstract: An air conditioning system having conditioned air supplied through at least one duct includes a damper blade assembly for varying the volume of conditioned air flow through said duct. A first inflatable bellows is connected to the damper blade assembly to vary the position thereof in said duct. The bellows is inflated in response to changes in the supply pressure of the conditioned air to maintain a substantially constant volume conditioned air flow downstream of said damper blade assembly. A second inflatable bellows is connected to the damper blade assembly for further varying the position thereof in the duct. The second inflatable bellows is inflated in response to the temperature of the air in the enclosure whereby the quantity of air discharged thereinto is reduced as the temperature of the enclosure approaches a predetermined level.Type: GrantFiled: December 7, 1977Date of Patent: February 5, 1980Assignee: Carrier CorporationInventors: William E. Clark, Carl C. Herb, Reginald S. Greene
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Patent number: RE36637Abstract: A regulator including a movably, preferably hingedly, mounted member having a distal face, exposed to a reference pressure, and a frontal face, exposed to fluid passing through the regulator. Attached to the member is a structure that variably impedes fluid flowing through the regulator. The amount that this structure impedes the fluid flow varies as a function of the difference between the pressure of fluid on the frontal face of the member and the reference pressure. The impeder may be an integral part of the piston extending into the path of the fluid flowing through the regulator, or it may be a separate structure attached to the member. As the member moves in response to changes in pressure differential across the piston, each movable segment is displaced with respect to its corresponding fixed segment. As the corresponding segments are further displaced with respect to each other, the impedance to flow increases.Type: GrantFiled: October 22, 1998Date of Patent: April 4, 2000Inventor: David W. Palmer